---
title: "Fixing \"Authentication required, Browser session mismatch\" error in Sage CRM — Ivan Kahl"
description: "Logging into Sage CRM over HTTPS with Internet Explorer can trigger a \"Browser session mismatch\" error. The cause and the fix are explained."
url: https://ivankahl.com/blog/fixing-authentication-required-browser-session-mismatch-error-in-sage-crm/
published: 2018-11-12T00:00:00.000Z
tags:
  - "Sage CRM"
  - "Security"
---

12 Nov 2018 · 1 min read

# Fixing "Authentication required, Browser session mismatch" error in Sage CRM

Logging into Sage CRM over HTTPS with Internet Explorer can trigger a "Browser session mismatch" error. The cause and the fix are explained.

When logging into Sage CRM using Internet Explorer, you might encounter the following error:

![1524556348898](https://ivankahl.netlify.com/static/1524556348898-0d5a52425a4dd825bcaafeb1287d26f8-d3bd4.png)

## Cause

This issue appears to be caused by a new security feature introduced in Sage CRM (7.3+) and appears when using Sage CRM over HTTPS.

## Solution

These solutions were obtained from [Sage City](https://sagecity.na.sage.com/support_communities/sage_crm/f/sage-crm-general-discussions/106832/authentication-required-browser-session-mismatch).

### Configure Internet Explorer

The best solution would be to configure Internet Explorer to avoid the issue from appearing.

1.  Open Internet Explorer and navigate to your Sage CRM instance
2.  Click **Close** and try log in again.

Uncheck the **Display intranet sites in Compatibility View** and remove any CRM server hosts from the list as seen below:

![website-compatibilty-views-c7631e39cd3e8207c165a7f69913ca9f-cc53d](https://blog.ivankahl.com/content/images/2019/02/website-compatibilty-views-c7631e39cd3e8207c165a7f69913ca9f-cc53d.png)

Click on the **Settings Icon** on the top right and select **Compatibility View settings**

![compatibility-view-settings-aae89bc92f1dd0890dc23efe9da291e5-495f5](https://blog.ivankahl.com/content/images/2019/02/compatibility-view-settings-aae89bc92f1dd0890dc23efe9da291e5-495f5.png)

### Disable the feature

Another solution could be to disable the feature entirely. This is not suggested, but if you have many users experiencing the same issue then this might be a good temporary solution so the system can still be used.

1.  Log into Sage CRM using another browser (e.g. Google Chrome)
2.  Go to **Administration -> System -> System Behaviour** and click **Change**
3.  Click **Save** to save the changes.

Change the *Use browser session security* field to *No*.

![1524556547398-8d303b719d9d93d64b2f698709539843-52fd6](https://blog.ivankahl.com/content/images/2019/02/1524556547398-8d303b719d9d93d64b2f698709539843-52fd6.png)

## Conclusion

These are two possible solutions for the problem. I would highly suggest that you configure Internet Explorer as a permanent solution and disabling the feature as a temporary solution. If none of these solve your issue, then please do leave a comment below.

## Disclaimer

I do not take any responsibility for any damage done to your system while following this guide. Be cautious and responsible when making changes to your system by making backups and ensuring that you know what consequences any actions you do will have in the system.

Tags: [Sage CRM](https://ivankahl.com/blog/tags/sage-crm/), [Security](https://ivankahl.com/blog/tags/security/)